I really like how GitHub highlights Haskell code, so I hacked at GeSHi's Haskell syntax file for a while until it worked in a similar fashion. It hasn't been heavily tested, but someone might find it useful.

You could use the Alex Gorbatchev's SyntaxHighlighter. Its javascript and really simple and well supported, easy to install and modify. Here are some instructions for blogger... but all you have to do you to do is remove the blogger=true line for a php CakeApp.